added short cut for oe (#1419)

package.json

@@ -381,6 +381,11 @@
         "key": "ctrl+shift+d",
         "mac": "cmd+shift+d",
         "when": "editorTextFocus && editorLangId == 'sql'"
+      },
+      {
+        "command": "workbench.view.extension.objectExplorer",
+        "key": "ctrl+alt+d",
+        "mac": "cmd+alt+d"
       }
     ],
     "configuration": {